Peter ， ____ honest boy， bought ____useful dictionary in the store yesterday．（ ）
| A． |
a； a |
B． |
an；an |
C． |
a； an |
D． |
an；a |
It has been much easier for me to go to work________ shared bikes appeared．
But they also caused plenty of problems．( )
A．sinceB．beforeC．unlessD．though
Who is the space scientist from Beijing？
The man______ white over there． He's of medium height.（ ）
A．withB．inC．orD．for
Johnny， it's noisy outside． Go and see what's going on．_____________．
I'm answering a call.（ ）
A．Just a minuteB．One more time
C．Let's goD．That's fine
Excuse me， I am doing a survey． May I know to pay？
About five times a week．（ ）
A．when you choose WeChat
B．whether did you try We Chat
C．how often you use WeChat
D．why do you prefer We Chat
All of us will take the entrance exam for the senior high school in June．
!（ ）
A．Of courseB．Good luck
C．CongratulationsD．You're welcome